JPH0325098Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a wind tube type air conditioner used in an air conditioner.

[Technical background of the invention and its problems]

BACKGROUND ART Find tube heat exchangers used as evaporators and condensers in air conditioners are required to be thin and have high heat exchange efficiency in order to reduce the size of indoor units.

However, as shown in Fig. 1, the conventional fin tube type heat exchanger is composed of a plurality of fins a and a pipe b passing through the fins a, so that the heat exchange air c is forced into the fin tube type heat exchanger. If the pipe is sent directly, there will be a dead zone d behind the pipe b
This creates a phenomenon in which the air becomes stagnant. For this reason, the heat transfer coefficient of the fins a at the rear of the pipe b is significantly reduced, and there is a disadvantage that this portion hardly contributes to heat transfer.

Therefore, as shown in Fig. 2 (Japanese Utility Model Publication No. 51-69951), a
It is known that cut and raised parts e and e are provided in the pipe b to forcibly guide the heat exchange air c to the rear of the pipe b to disturb the dead area, but this method changes the air flow path. This has the disadvantage that ventilation resistance increases, causing a decrease in air volume.

[Purpose of invention]

This idea was made with attention to the above circumstances, and its purpose is to provide a heat exchanger that can improve heat exchange efficiency without increasing ventilation resistance and has a simple structure. This is what I am trying to do.

[Summary of the idea]

A part of the fin located at the rear of the pipe, that is, the dead area, is cut and raised, and a folded part is provided that is almost parallel to the fin, allowing heat to be exchanged without changing the flow path of the heat exchange air that passes between the fins. This is an attempt to improve exchange efficiency.

[Example of idea]

This invention will be explained below based on an embodiment shown in the drawings. FIG. 3 shows the entire fin tube heat exchanger, which is composed of a plurality of fins 1 and pipes 2 passing through these fins 1. A refrigerant is passed through the pipe 2, and heat exchange air 3 is passed between the fins 1 by a blower. Further, the rear of the pipe 2, that is, the heat exchange air 3
As shown in FIGS. 4 and 5, the fins 1 located on the downstream side of the fins 1 are provided with folded portions 4. The folded portion 4 is formed by cutting the side edge of the fin 1 located at the rear of the pipe 2 into a substantially T-shape, bending the resulting two tongue pieces 4a, 4a at right angles, and further forming the bent portion 4b. , 4b outward, and the folded portions 4 are substantially parallel to the fins 1 and are spaced apart from each other. And each pipe 2...
A notch 5 is formed in the rear fin 1, and an air passage 6 is formed between the fin 1 and the folded portion 4.

Therefore, the heat exchange air 3 passes between the fins 1 and between the fins 1 and the folded part 4, and the fins 1, which were conventionally located in the dead area, also serve as the folded part 4 and the heat exchange air 3 passes between the fins 1 and the folded part 4. It comes into contact with the mainstream, increasing the heat transfer area.

[Effect of idea]

As explained above, this idea was created by cutting a part of the fins downstream of the heat exchange air pipe that passes between the fins and providing a folded part that is almost parallel to the fins. The fins also come into contact with the mainstream of the heat exchange air, increasing the heat transfer coefficient and improving the heat exchange efficiency. In addition, by providing the folded portions in parallel with the fins, ventilation resistance is not increased, so that the air volume can be maintained.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory views showing different conventional examples, Figure 3 is a perspective view of a heat exchanger showing an embodiment of this invention, Figure 4 is a perspective view of the main parts, and Figure 5 is It is also a sectional view of the main part. 1...fin, 2...pipe, 4...turning part.

Claims (1)

[Scope of utility model registration request] In a fin tube heat exchanger consisting of a plurality of fins and pipes passing through these fins, a part of the fins is located in a dead area downstream of the pipe for heat exchange air passing between the fins. A heat exchanger characterized in that a folded portion is provided which is cut and raised and is substantially parallel to the fins so as to come into contact with the mainstream of the heat exchange air.